Harness-control mechanism for pattern weaving



J. O. CORN March 25, 1930.

HARNESS CONTROL MECHANISM FOR PATTERN WEAVING Filed N:arch 23, 1928 2 Sheets-Sheet l Paw Q]: @IIb, INVENTOR ATTORNEYS March 25, 1930. J. o. CORN 1,752,237

HARNESS CONTROL MECHANISM FOR PATTERN WEAVING Filed March 23, 1928 2 Sheets-Sheet 2 ll lwllsllal 9 I w i i il INVENTOR,

@IID ll Q. '0

a ling? J O. C0770,

ATTORNEYS SEO Patented Mar. 25, 1930 UNITED STATES PATENT OFFEE JAMES O. CORN, OF COLUMBIA, SOUTH CAROLINA Application filed March 23, 1928.

This rinwelrtiion relates to loom harness cont-nol (mechanism and aims, among other objects, to provide a relatively simple and relatimely cheap attachment ,to cooperate with one or more .treadles of a plain loom to produne many of the same pattern weaves as those heretofore produced by the expensive and complicated dobby pattern heads.

in the accompanying drawing ig. 1 is a fragmentary side .elevation sho wi-ng one embodiment of the attachment applied ;to @a multiple treadle loom;

'2 is a fragmentary top plan iofthe attachment shown in Fig. 1.;

Fig. 3 is a sectional View taken on the line 3-,3 of Fig. 2;

Fig. 4 is a frontelevation showing a pair of pattern .chains, .parts being omitted;

.Fig. 5:ise1 sectional view taken on the line 5-=15lf Fig. 3:; and

,F igsa6 and 7 are detail views of a brake wheehanda pawl and ratchet shown in Fig. 5.

Referring particularly to the drawing, the selected (embodiment of the attachment is shown hyawayrofillustration as .being applied to .a plain :loom 10 having a plurality of tneadles and 13 adapted to be actuated by the usual earns .14 and connected to harnesses 3:15., 16, 17 and 18in a well known manner. l'It will be understood however that the devicegisadaptedtobe applied to a loom having one IQI'KIIIQFB such :treadlesand harnesses; bntiherein, the control mechanism cooperates with two :treadles lleand 12 connected to the harnesses =15, 16 and 17, the treadle 11 being applied to a double harness in a manner well known in' the art.

illo produce the ordinary pattern weaves suclnas pla'inlooms are capable of making, it is nmderstood that two or more harnesses must beheld periodicallyinactive; that is to sayathe cam operating mechanism must be periodically disabled automatically according tothe .desired pattern. Herein, this is accomplished by pattern controlled mechanism arranged to hold theitreadles 11 and 12 inactiveor out of-engagement at-intervals with their respective-cams '14. Referring to Fig. 1, the "treadle 11 is there shown as being down sorth'atthe high part of the cam will not Serial. No. 264,204.

strike it. The connections between the harnesses and treadles will be such that the inactive harnesses will support their respective warp threads in the upper or lower shed.

In the present example, the attachment inas cludes a pair of rockable latch levers (Figs.

2 and 5) having wedge shaped latch members 19 on their faces arranged to be swung over the ends of the treadles, being aligned with them and mounted to swing in the same verti- 60 cal planes as the treadles. The upper ends of the latch levers are shown as being pivotally mounted on a common shaft 20 secured to a bracket in the form of a U-shaped frame 21 which is attached to the loom frame.

To control the latch levers a pair of pattern chains 22 of well known design are mounted on sprocket wheels 23 secured directly behind each lever on a common rotatable shaft- 24 and the levers have rearwardly projecting arms 25 presenting anti-friction rollers 26 adapted to engage the chain links, the arrangement being such that, when the riser links on a chain engage the roller, the latch lever will be disengaged from its treadle as shown in F ig. 3, and when these links have passed under the roller, the latch lever will swing to the right as viewed in Fig. 1 to lock the treadle. The levers are shown as being adapted to swing to locking position by gravity by reason of their angular positions. That is to say, the levers will naturally swing to their vertical positionsaided by the weight of the arms 25.

The pattern sprocket wheels are adapted to be rotated step by step in proper timed relation with the loom. To this end, the shaft is shown as being journaled in both arms of the U-shaped frame and has a ratchet wheel 27 secured to it between the arms (Figs. 5 and 7) and the pawl 28 for operating ratchet is shown being connected by appropriate means to actuated by a cam 29 on a shaft 30 of the loom 1).

Also, on the shaft 24, between the arms of the frame 21, there is shown a check wheel 31 having notches 32 for a roller 33 mounted on a pivoted arm 34 to which a tension spring 35 is connected so that the roller will check the rotation of the shaft after each impulse threads in the top or bottom shed, dependand their associated mechanism.

ing on the desired connection between the harnesses and the treadles. Thus, the sheds will be open for the filling picks and the warp threads will be floated and, while they are released to be actuated by their respective cams, the harnesses will produce plain weaves. When the control mechanism is applied to a loom having a single treadle to which is connected a double harness such as the harnesses 15 and 16 shown in Fig. 1, it will produce a corded fabric or dimity. Moreover, it is understood that any of the treadles may be permanently disabled by simply disengaging them from their harnesses and dropping them to the floor or out ofthe path of their cams.

From the foregoing description it will be seenthat the improved control mechanism is very simple and can be made very cheaply. It is also applicable toplain looms without requiring any modification of the treadles The whole thing may be attached to the frame of a loom and is capable of controlling as many harnesses as may be required for ordinary pattern weaving, it being only necessary to increase the number of latch levers and pattern chains. All of the parts are easily replaceable without excessive cost and can be installed by unskilled laborers. Further, the cost of the entire attachment installed on a loom is only a small fraction of the cost of the expensive and complicated dobby head attachments.

Obviously the present invention is not restricted to the particular embodiment thereof herein shown and described. Moreover, it is not indispensable that all the features of the invention be used conjointly, since they may be employed advantageously in various coinbinations and sub-combinations.

What is claimed is:

1. In combination with a loom of the character described, a plurality of adjacent cam operated treadles connected to the harnesses thereof below the lower ends of the harnesses; mechanism for controlling the operation of the treadles to produce pattern weaves including pattern controlled latch means periodically engaging the end of one of the treadles to hold it out of engagement with its cam while the other treadles are being operated.

2. In combination with a plurality of adjacent treadles of a plain loom, pattern controlled latch mechanism constructed and arranged directly to engage and hold one of the treadles inactive periodically while the other treadles are being operated; and actuating means for the pattern mechanism.

3. In combination with a treadle of a plain loom, pattern controlled mechanism adjacent to the end of the treadle including a swinging latch lever periodically movable into and out, of engagement with the free end of the treadle; a pattern chain cooperating with the latch lever to effect such movements; and means to drive the pattern chain in proper timed relation.

4. A pattern control attachment for plain looms comprising, in combination, a frame member adapted to be connected to the loom frame; a counterweighted latch lever pivotally connected to the frame member and adapted to be moved into and out of engagement with the extreme end of a treadle; an operating arm for the latch lever projecting rearwardly of its pivotal connection; and a pattern chain cooperating with the operating arm and connected to be driven in proper timed relation.

5. A pattern control attachment for plain looms comprising, in combination, a frame member adapted to be connected to the loom frame; a latchlever pivotally connected to the frame member and adapted to be moved into and out of engagement with the end of a treadle; an operating armintegral with the latch lever projecting rearwardly of its pivotal connection; a pattern chain cooperating with the operating arm and connected to be driven in proper timed relation; and an anti-friction roller on said operating arm adapted to engage said pattern chain.

6. A pattern control attachment for plain loom comprising, in combination, a substantially U-shaped frame member adapted-to be attached to the loom frame adjacent to the ends of the loom treadles; a pluralityoflatch levers pivotally connected'to the frame member above the ends of the treadles and arranged side by side; operating arms projecting from the upper ends of the latch levers; pattern chains arranged sidebyv side behind and cooperating with the'respective operating arms; sprocket wheels for the pattern chains rotatably mounted on said frame member; a common shaft for-driving said sprocket wheels; pawl and ratchet mechanism operatively connected to a shaft of the loom to drive the shaft and said sprocket wheels; and springcheck means connected to check the rotation of the shaft after it is actuated by the pawl and ratchet.

7 In combination with a plain loom having a plurality of harnesses and a plurality of adjacent treadles, pattern controlled latch mechanism arranged adjacent to the free ends of the treadles and operable selectively and periodically to engage some of the treadles and hold them inactive while the other treadles not so engaged are operating. In testimony, that I claim the foregoing as my own, I have hereto afi ixed my signature.

JAMES O. CORN. 

